Three teachers – Ed (Richard Alden), Doris (Helen Hovey) and Carl (Don Russell) – are driving into Los Angeles for a Dodgers game when they have car trouble and pull off into a secluded wrecking yard.
There they are held at bay by bloodthirsty young psycho Charlie Tibbs (Arch Hall Jr. ) and his crazy girlfriend, Judy (Marilyn Manning) who have been on a killing spree across the state and are wanted by the cops.
The characters of Charlie and Judy were inspired by real-life serial killers Charles Starkweather and Caril Fugate. The character of Judy acts like a very young teenager (like the real 14-year-old Fugate) but a police radio announcer was added to clarify that Judy is 18 years old, in order to sidestep censorship problems.
Squinty-eyed Arch Hall Jr. is a terrible actor and regularly goes over the top here, but he does make an utterly loathsome villain.
The majority of the series of early-1960s z-grade drive-in films starring Arch Hall Jr. (usually written and produced by his father, Arch Hall Sr.) are truly awful. The Sadist is certainly a cut above the others.
Arch Hall Jr.
Arch Hall Sr.